About Us

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More Than Just Heating and Air


Guaranteed Mechanical has provided installation and maintenance of HVAC systems throughout the Chicagoland area for generations.  We’ve built our reputation by asking one question over and over,

“How Can We Do It Better?”

That question has led us to several answers, including:

  • Building trust and long-term relationships by offering sound advice to each customer. We only replace systems that need replacing.  Our customers trust our advice, and we are the only call they need to make.
  • Recommending Amana products where appropriate. They offer the best warranty in the industry, which provides peace of mind.  Guaranteed Mechanical took the additional step of touring Amana’s production facility in Texas.  We recommend these products because we’ve witnessed the quality with which they are made.
  • Maintaining a First-Class Workforce. Trust is built when you deal with the same people over time.  We are very proud that most of our team has over 15 years of tenure with Guaranteed Mechanical.  Our team gets to know our customers, and makes reliable recommendations.
  • Living up to our Word. To put it plainly, we make it right.  We do what we say we’re going to, because your satisfaction and your trust are our top priorities.

We know that after your first interaction with our friendly team, you’ll be a customer for life.  Our customers refer people to us routinely because of the quality of care that our team shows for every project. 


Local, Family-Owned Company


Guaranteed Mechanical is a family owned and operated company specializing in the new construction installation of heating and cooling systems.  Our team of professionals are all based out of the Chicagoland area, and not part of a national network, and many of our long-term customers know us by name.

Air Conditioning Systems

Company Bios


Service Tech

Chris Lackey

Hello my name is Chris Lackey, I have been in the HVAC industry for 9.5yrs. Started as a pipe fitter then turned into a service tech and installer. Currently working with Guaranteed Mechanical. I am 41yrs old happily married to my beautiful wife. Moved to Aurora IL, from Warrenville IL 4yrs ago. I work with a great experienced team at Guaranteed Mechanical.

HVAC Technician

Dan Chilcutt

Lived in Lombard 40 years
15 years HVAC experience service and installation. (second generation)
Troubleshooting specialist

HVAC Technician

Joe Walsh

My name is Joe Walsh and I live in big rock with my wife and two children. I have been doing HVAC since 1992 after serving in the US ARMY, I’ve worked for three different companies in that time with The first 15 years concentrated in residential installation, retrofit and service. The last fifteen have been a mix of residential, commercial, Industrial and refrigeration installation, retrofit and service.